造孔剂法制备孔隙率可控的多孔镍钛合金(英文)

被引：17

作者：

张宇鹏 ^{[1
]}

钟志源 ^{[1
]}

张新平 ^{[2
]}

机构：

[1] 香港城市大学物理与材料科学系

[2] 华南理工大学机械学院材料科学与技术研究所

来源：

材料科学与工程学报 | 2007年 / 06期

关键词：

多孔镍钛形状记忆合金; 马氏体相变; 造孔剂; 内耗;

D O I：

10.14136/j.cnki.issn1673-2812.2007.06.022

中图分类号：

TG139.6 [];

学科分类号：

080502 ;

摘要：

用常规粉末冶金烧结法结合造孔剂技术制备了多孔镍钛形状记忆合金。研究结果表明,孔隙特征主要取决于所用造孔剂的尺寸和形貌,而孔隙率可以通过加入造孔剂的含量来调控;所制备合金的主要成分是B2相和B19’相的NiTi,在经高温固溶处理后仍有极少量的Ti2Ni,Ni3Ti和Ni4Ti3等杂质相存在,而且合金杂质相的含量随造孔剂加入量的增加而相应提高。对合金的相变热分析表明,在从高温降至低温过程中多孔镍钛发生特殊的三阶段相变,这主要是由合金成分和相组成在晶界的不均匀造成的。最后,研究表明相变对多孔镍钛合金的阻尼性能(内耗)有独特的影响,而孔隙率对阻尼的影响则不明显。

引用

页码：938 / 942+968 +968

页数：6

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